porthole

As a noun porthole

is a circular window set in the hull of a ship.

As an adjective false is

(label) one of two states of a boolean variable; logic.

As a noun porthole

is a circular window set in the hull of a ship.

As an interjection harch is

the command issued by the drum major of a marching band to move forwards.

As a noun porthole

is a circular window set in the hull of a ship.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between porthole and null

is that porthole is a circular window set in the hull of a ship while null is zero, nil; the cardinal number before einn.

As nouns the difference between porthole and pigeonhole

is that porthole is a circular window set in the hull of a ship while pigeonhole is a nook in a desk for holding papers.

As a verb pigeonhole is

to categorize; especially to limit or be limited to a particular category, role, etc.

is likely misspelled.

has no English definition.

As a noun porthole

is a circular window set in the hull of a ship.

As nouns the difference between porthole and crenel

is that porthole is a circular window set in the hull of a ship while crenel is the space between merlons in a crenelated battlement.

As nouns the difference between porthole and posthole

is that porthole is a circular window set in the hull of a ship while posthole is (archaeology) a cut feature used to hold a surface timber or stone, usually much deeper than it is wide.

As nouns the difference between porthole and pothole

is that porthole is a circular window set in the hull of a ship while pothole is a shallow pit or other edged depression in a road's surface, especially when caused by erosion by weather or traffic.

As nouns the difference between porthole and quickwork

is that porthole is a circular window set in the hull of a ship while quickwork is (nautical|archaic) all of the submerged section of a vessel's planking.